250139 has 4 divisors (see below), whose sum is σ = 258240. Its totient is φ = 242040.

The previous prime is 250123. The next prime is 250147. The reversal of 250139 is 931052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 250139 - 2⁴ = 250123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 250139.

It is not an unprimeable number, because it can be changed into a prime (250109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4004 + ... + 4065.

It is an arithmetic number, because the mean of its divisors is an integer number (64560).

2²⁵⁰¹³⁹ is an apocalyptic number.

250139 is a deficient number, since it is larger than the sum of its proper divisors (8101).

250139 is an equidigital number, since it uses as much as digits as its factorization.

250139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 250139 is about 500.1389806844. The cubic root of 250139 is about 63.0077256000.

The spelling of 250139 in words is "two hundred fifty thousand, one hundred thirty-nine".